924Board.org

Iwan · Joined: 26 Jan 2006 Posts: 8 Location: UK

My temperature gauge is bizzare. Sometimes on start - it shoots to the right - into the red zone and then returns to dead. Sometimes it doesnt. Usually it hovers around very very cold and creeps its way up to 1/4 if the car is very hot - I.E. the radiator fan has cut in.

Coolant has been recently changed, is nice and clean and has the correct amount of anti-freeze... it's been bled as specified in the handbook. It has a new radiator cap and no leaks.

Any clues?

Thanks

Ozzie · Posted: Fri Feb 03, 2006 7:15 am Post subject:

Sound normal.
These cars are well known for bad earthing.
Major earthing points around the car get corroded and give bad readings.
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

timstar92404 · Joined: 22 Sep 2004 Posts: 2075 Location: richmond BC

I'm not sure but I'd guess a bad ground. when one of my ground wires burnt up in my dash fire all the gauges were going all the way to the right.

if this happens right when it starts then obviously the car can't overheat that fast.
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78 924 sold.
85.5 944

Smoothie · Posted: Fri Feb 03, 2006 7:52 am Post subject:

You might have a loose piece of aluminum foil insulation cover at the back of the head that's occasionally making contact with a sensor connection.
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"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

Also there is a mass of small brown ground wires that connect with the heavy ground on the top of the engine from the firewall by the coil.
This is where my short was.
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1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.